Lock nut



Dec.-27, 1927. 1,653,982

G. BURKE ET AL LOCK NUT Original Filed Feb. 17., 1927 &

gnumdo'o GuLZZermo Bur/re and, ManueZ Aaosfa till atenteol Dec. 27, 1927.

UNITED STATES GUTLLERMO BURKE AND MANUEL ACOSTA, F BUENUS .AIBEEi,

ARGENTINA.

LUCK NUT.

substitute for application Serial No. 169,010, filed February 1?, 192?, and in Argentina January 23, 192?.

This application filed November 11?, 192?.

@ur present invention relates to an end lock nut provided with means which is adapted to be screwthreaded on an axle, bolt or the like to act as a safety device against unauthorized removal and is a substitute for and a continuation in part of our application Serial No. 169,010, filed February 17, 1927. It is an object of this invention to provide lock means Within the casing of the nut and to provide a disc which is screwthreaded to engage the bolt. The casing is n'iovably mounted on the disc so that the nut cannot be removed by applying a wrench or the like on the casing. lit is a further object of the invention to provide a pin or pins in the disc which is adapted to engage a perforation in the bolt and the pins are spring pressed to automatically enter into the perforation. A still further object of the invention resides in the lock and lock connections to the pins and the specific circular and part-spherical shape and mounting of the casing.

Other objects will be apparent from the following description taken in connection with the accompanying drawing in which:

Figure 1 is a longitudinal section of the lock nut taken in the plane of the pins,

Fig. 2 is a longitudinal section of the lock nut of Fig. 1 taken at right angles thereto,

Fig. 3 is a top view of the lock mechanism and the disc,

Fig. 4 is a side view of the lock nut with the casing removed,

Fig. 5 is a bottom view of the lock mechanism showing the pins and actuators therefor, and

Fig. 6 is a top view of the disc showing the pins and actuators therefor.

The construction comprises a head 2 of a bolt 1 having a screwthreaded end 3 in which a perforation 4 is provided diametrically through the bolt. A circular and somewhat part spherical casing 5 is provided with a central opening 9 and a disc 14. The edge of the disc is provided with a ridge 21 over which the edge of the casing is forced or crimped to prevent removal of the easing therefrom but at the same time allowing the casing to rotate with low frictional re sistance. The disc has two channels 22 therein in which the bolts or pins 6 slide. Al

though one pin can be used it is preferable to use two pins and these pins are adapted to enter the perforation 4 of the bolt 1. The

Serial No. 233,915.

disc is provided with a projecting portion 23 in which the pins are guided and slide and on which the lock mechanism 24 is secured by any suitable means such as screws 25. The lock mechanism may be of the barrel and tumbler type as clearly shown in Fig. 2 in which the double key actuates thle pins 26 to permit rotation of the barre 17.

According to Figs. 3 to 6 the operation of the elements of the mechanism between the lock and pins 6 is clearly shown. The barrel 17 has suitable gripping members 27 secured thereto at the bottom which grip and actuate the connector 19. This connector has rounded ends 28 engaging in rounded detents in the pin levers 18. These levers slide in the space 30 under the lock mechanism 20 and have one free end 31 and a curved end 32 secured into its respective pin by a projection 33. it is obvious that move-- ment of the barrel and connector 19 will slide the levers 18 in opposite directions relative to each other to thereby actuate the pins out of the perforation 4.

The lock mechanism has a surrounding shell 35 and between it and the outer casing 34: of the lock mechanism springs 16 are pro vided, one for each lever 18. One end of the spring bears against the rounded end of the lever 18 at 8 to, at all times, force the pins 6 inwardly.

Considering the utility of this construction, it has been found that the lock nut is particularly well adapted to be used on motor vehicles since the lock nut on a motor car absolutely prevents theft of the spare wheel when applied thereto. When placed on a bolt and screwed down, the lock nut immediately. becomes automatically and securely closed. As clearly shown the cap or casing which covers the lock turns in any direction, as it is of the type which might be referred to as an idler, so that there is no support or means by which the lock might be forced. The lock is cylindrical, and on account of its special mechanism, of double movement.

Furthermore, the casing is so crimped over the edge of the disc that the disc cannot be moved within the casing due to the ridge 21 and the casing can rotate in both directions on the disc but cannot be pulled off due to the crimp 22. The crimp is so made that free rotation is permitted but a certain fricplaced by means of the screwthreads of the shell-like casing disc and having a perforation therein; a pin slidably mounted on said disc and adapted to project into said perforation in the bolt; and lock means in the casing and on said disc adapted to control the pin in the perforation. 2. An end lock nut comprising a circular shell-like casing including a disc, said casing being movably mounted thereon and said disc being screwthreaded; a bolt having a screwthreaded end over which the casing is adapted to be placed by means of the screwthreads of the disc and having a perforation therein; a plurality of pins slidably mounted on said disc and each adapted to project into the perforation in the bolt; lock means in the casing and on said disc adapted to control the pins in the perforations; and springs on the lock means for forcing the pins inwardly.

3. An end lock nut comprising a circular having a central opening therein and including a circular disc, said casing being movably mounted thereon and the disc being internally screwthreaded; a bolt havinga screwthreaded end over which the casing is adapted to be laced by means of the screwthreads of the disc and having a perforation therein; a pin slidably mounted on said disc and adapted to project into the perforation in the bolt; alever secured at one end to the pin; and lock means in the casing and secured on the said disc adapted to control the pin by means of the lever, said pin being adapted to be moved out of the perforation in the bolt by actuation of a key inserted through the central opening in the casing into the lock means.

4. An end lock nut comprising a circular shell-like casing having a central opening therein including a circular disc, said casing being movably mounted thereon and said disc being internally screwthreaded; a bolt having a screwthreaded end over which the casing is adapted to be placed by means of the screwthreads of the disc and having a diametrically-arranged perforation therein; two pins slidably mounted on said disc, each pin being adapted to project into the perforation in the bolt; a lever secured at one end to each pin; and lock means in the casing secured on the said disc and adapted to control the levers by means of the arms, sai pins being adapted to be moved out of the perforation in the bolt by actuation of a key insertedthrough the central opening in the casing into the lock means to remove the casing and when the pins occupy a position midway in the perforation said casing is locked to the bolt.

In testimony whereof we aifix our signatures. 

